US4798762A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminate board containing uniformly distributed filler particles and method for producing the same
Assignee: Toray Industries Inc
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Filing: 1987-01-20
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Granted: 1989-01-17
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Expires: 2007-01-20
Abstract
Abstract A copper clad laminate board for a printed circuit has a center plate which is a thermosetting resin containing hollow glass microspheres uniformly distributed in the resin. The center plate has sheets provided on both sides thereof, which sheets are a thermosetting resin having a reinforcing fabric. The board has a high electrical resistance and resists bending during subsequent processing.
Inventors
- 👤 Reisuke Okada
- 👤 Hisami Fujino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:11
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/12; H; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/0313; H05K1/0353; H05K1/036; H05K1/0373; H05K1/0366; H05K2201/00; H05K2201/02; H05K2201/0203; H05K2201/0242; H05K2201/0254; Y; Y10; Y10S; Y10S428/00; Y10S428/901; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249924; Y10T428/24994; Y10T428/24995; Y10T428/249953; Y10T428/249971; Y10T428/249973; Y10T428/249974; Y10T428/25; Y10T428/252; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265; Y10T428/29; Y10T428/2982; Y10T428/31504; Y10T428/31678; Y10T428/31688; Y10T428/31692
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
85 words
A copper clad laminate board for a printed circuit, having a thickness from 0.5 to 1.6 mm, comprising a center plate which consists of a thermosetting resin and hollow glass microspheres, uniformly distributed in said resin, the volume fraction of which ranges from 0.5 to 0.7, based upon the volume of the center plate, and sheets, provided on both sides of said center plate, which comprise a thermosetting resin and a reinforcing fabric, the specific gravity of the laminate board being from 0.8 to 1.3.
Claim 2
Dependent Claim
85 words
A copper clad laminate board for a printed circuit, having a thickness from 0.5 to 1.6 mm, comprising a center plate which consists of a thermosetting resin and hollow glass microspheres, uniformly distributed in said resin, the volume fraction of which ranges from 0.5 to 0.7, based upon the volume of the center plate, and sheets, provided on both sides of said center plate, which comprise a thermosetting resin and a reinforcing fabric, the specific gravity of the laminate board being from 0.8 to 1.3.
Claim 3
Dependent Claim
18 words
The laminate board of claim 1, wherein the center plate has a thickness of at least 0.3 mm.
Claim 4
Dependent Claim
14 words
The laminate board of claim 1, wherein the reinforcing fabric is made of glass.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-01-17 | 1992-07-18 | 1993-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-17 | 1996-07-18 | 1997-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-17 | 2000-07-18 | 2001-01-17 | $7700.00 | Window Closed / Lapsed |